120202211211221 has 4 divisors (see below), whose sum is σ = 120202318879692. Its totient is φ = 120202103542752.

The previous prime is 120202211211211. The next prime is 120202211211241. The reversal of 120202211211221 is 122112112202021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55358971810321 + 64843239400900 = 7440361^2 + 8052530^2 .

It is a cyclic number.

It is not a de Polignac number, because 120202211211221 - 2⁶ = 120202211211157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 120202211211193 and 120202211211202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120202211211211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52141886 + ... + 54398351.

It is an arithmetic number, because the mean of its divisors is an integer number (30050579719923).

Almost surely, 2^{120202211211221} is an apocalyptic number.

It is an amenable number.

120202211211221 is a deficient number, since it is larger than the sum of its proper divisors (107668471).

120202211211221 is a wasteful number, since it uses less digits than its factorization.

120202211211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107668470.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 120202211211221 its reverse (122112112202021), we get a palindrome (242314323413242).

The spelling of 120202211211221 in words is "one hundred twenty trillion, two hundred two billion, two hundred eleven million, two hundred eleven thousand, two hundred twenty-one".